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@@ -37,6 +37,7 @@ modules.builtin | |
tags | ||
TAGS | ||
vmlinux | ||
vmlinuz | ||
System.map | ||
Module.markers | ||
Module.symvers | ||
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Kernel driver amc6821 | ||
===================== | ||
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Supported chips: | ||
Texas Instruments AMC6821 | ||
Prefix: 'amc6821' | ||
Addresses scanned: 0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, 0x4c, 0x4d, 0x4e | ||
Datasheet: http://focus.ti.com/docs/prod/folders/print/amc6821.html | ||
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Authors: | ||
Tomaz Mertelj <tomaz.mertelj@guest.arnes.si> | ||
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Description | ||
----------- | ||
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This driver implements support for the Texas Instruments amc6821 chip. | ||
The chip has one on-chip and one remote temperature sensor and one pwm fan | ||
regulator. | ||
The pwm can be controlled either from software or automatically. | ||
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The driver provides the following sensor accesses in sysfs: | ||
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temp1_input ro on-chip temperature | ||
temp1_min rw " | ||
temp1_max rw " | ||
temp1_crit rw " | ||
temp1_min_alarm ro " | ||
temp1_max_alarm ro " | ||
temp1_crit_alarm ro " | ||
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temp2_input ro remote temperature | ||
temp2_min rw " | ||
temp2_max rw " | ||
temp2_crit rw " | ||
temp2_min_alarm ro " | ||
temp2_max_alarm ro " | ||
temp2_crit_alarm ro " | ||
temp2_fault ro " | ||
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fan1_input ro tachometer speed | ||
fan1_min rw " | ||
fan1_max rw " | ||
fan1_fault ro " | ||
fan1_div rw Fan divisor can be either 2 or 4. | ||
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pwm1 rw pwm1 | ||
pwm1_enable rw regulator mode, 1=open loop, 2=fan controlled | ||
by remote temperature, 3=fan controlled by | ||
combination of the on-chip temperature and | ||
remote-sensor temperature, | ||
pwm1_auto_channels_temp ro 1 if pwm_enable==2, 3 if pwm_enable==3 | ||
pwm1_auto_point1_pwm ro Hardwired to 0, shared for both | ||
temperature channels. | ||
pwm1_auto_point2_pwm rw This value is shared for both temperature | ||
channels. | ||
pwm1_auto_point3_pwm rw Hardwired to 255, shared for both | ||
temperature channels. | ||
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temp1_auto_point1_temp ro Hardwired to temp2_auto_point1_temp | ||
which is rw. Below this temperature fan stops. | ||
temp1_auto_point2_temp rw The low-temperature limit of the proportional | ||
range. Below this temperature | ||
pwm1 = pwm1_auto_point2_pwm. It can go from | ||
0 degree C to 124 degree C in steps of | ||
4 degree C. Read it out after writing to get | ||
the actual value. | ||
temp1_auto_point3_temp rw Above this temperature fan runs at maximum | ||
speed. It can go from temp1_auto_point2_temp. | ||
It can only have certain discrete values | ||
which depend on temp1_auto_point2_temp and | ||
pwm1_auto_point2_pwm. Read it out after | ||
writing to get the actual value. | ||
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temp2_auto_point1_temp rw Must be between 0 degree C and 63 degree C and | ||
it defines the passive cooling temperature. | ||
Below this temperature the fan stops in | ||
the closed loop mode. | ||
temp2_auto_point2_temp rw The low-temperature limit of the proportional | ||
range. Below this temperature | ||
pwm1 = pwm1_auto_point2_pwm. It can go from | ||
0 degree C to 124 degree C in steps | ||
of 4 degree C. | ||
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temp2_auto_point3_temp rw Above this temperature fan runs at maximum | ||
speed. It can only have certain discrete | ||
values which depend on temp2_auto_point2_temp | ||
and pwm1_auto_point2_pwm. Read it out after | ||
writing to get actual value. | ||
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Module parameters | ||
----------------- | ||
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If your board has a BIOS that initializes the amc6821 correctly, you should | ||
load the module with: init=0. | ||
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If your board BIOS doesn't initialize the chip, or you want | ||
different settings, you can set the following parameters: | ||
init=1, | ||
pwminv: 0 default pwm output, 1 inverts pwm output. | ||
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